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Mariangela Coppola1, Pasquale Cascone2, Simone Bossi3

  • 1Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy. mariangela.coppola@unina.it.

International Journal of Molecular Sciences
|September 16, 2018
PubMed
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Tomato plants

Area of Science:

  • Plant Science
  • Chemical Ecology
  • Genetics

Background:

  • Plants release volatile organic compounds (VOCs) to attract natural enemies of herbivores.
  • Constitutive VOCs, released before attack, can influence plant defense and fitness.
  • Genetic basis of constitutive VOCs in tomato defense is poorly understood.

Purpose of the Study:

  • Investigate the role of two sesquiterpene synthase genes (TPS9 and TPS12) in constitutive VOC emission in tomato.
  • Determine the impact of silencing these genes on plant defense against herbivores and parasitoids.

Main Methods:

  • Utilized RNA interference (RNAi) to silence TPS9 and TPS12 genes in tomato plants.
  • Analyzed constitutive VOC profiles of silenced and control plants.
  • Assessed the effects of silenced plants on the aphid parasitoid *Aphidius ervi* and the herbivore *Spodoptera exigua*.
Keywords:
Aphidius erviRNAiSesquiterpene SynthaseSpodoptera exiguaconstitutive release of VOC

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Main Results:

  • Silenced plants showed altered constitutive VOC emissions compared to controls.
  • Reduced attractiveness of silenced plants to the aphid parasitoid *Aphidius ervi*.
  • Impaired larval development of *Spodoptera exigua* on silenced plants.

Conclusions:

  • TPS9 and TPS12 play a significant role in constitutive VOC-mediated plant defense in tomato.
  • These genes influence both direct (herbivore development) and indirect (natural enemy attraction) defenses.
  • Findings provide insights into the metabolic regulation of plant volatiles and their role in defense.